atsushi uno / Mbed OS mbed-os-example-blinky-L152

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README.md@0:8f6e8d2d14d2, 2020-02-16 (annotated)

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aie
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Sun Feb 16 04:34:26 2020 +0000
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aie 0:8f6e8d2d14d2 1 ![](./resources/official_armmbed_example_badge.png)
aie 0:8f6e8d2d14d2 2 # Blinky Mbed OS example
aie 0:8f6e8d2d14d2 3
aie 0:8f6e8d2d14d2 4 The example project is part of the [Arm Mbed OS Official Examples](https://os.mbed.com/code/) and is the [getting started example for Mbed OS](https://os.mbed.com/docs/mbed-os/v5.14/quick-start/index.html). It contains an application that repeatedly blinks an LED on supported [Mbed boards](https://os.mbed.com/platforms/).
aie 0:8f6e8d2d14d2 5
aie 0:8f6e8d2d14d2 6 You can build the project with all supported [Mbed OS build tools](https://os.mbed.com/docs/mbed-os/latest/tools/index.html). However, this example project specifically refers to the command-line interface tool [Arm Mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli).
aie 0:8f6e8d2d14d2 7 (Note: To see a rendered example you can import into the Arm Online Compiler, please see our [import quick start](https://os.mbed.com/docs/mbed-os/latest/quick-start/online-with-the-online-compiler.html#importing-the-code).)
aie 0:8f6e8d2d14d2 8
aie 0:8f6e8d2d14d2 9 1. [Install Mbed CLI](https://os.mbed.com/docs/mbed-os/latest/quick-start/offline-with-mbed-cli.html).
aie 0:8f6e8d2d14d2 10
aie 0:8f6e8d2d14d2 11 1. Clone this repository on your system, and change the current directory to where the project was cloned:
aie 0:8f6e8d2d14d2 12
aie 0:8f6e8d2d14d2 13 ```bash
aie 0:8f6e8d2d14d2 14 $ git clone git@github.com:armmbed/mbed-os-example-blinky && cd mbed-os-example-blinky
aie 0:8f6e8d2d14d2 15 ```
aie 0:8f6e8d2d14d2 16
aie 0:8f6e8d2d14d2 17 Alternatively, you can download the example project with Arm Mbed CLI using the `import` subcommand:
aie 0:8f6e8d2d14d2 18
aie 0:8f6e8d2d14d2 19 ```bash
aie 0:8f6e8d2d14d2 20 $ mbed import mbed-os-example-blinky && cd mbed-os-example-blinky
aie 0:8f6e8d2d14d2 21 ```
aie 0:8f6e8d2d14d2 22
aie 0:8f6e8d2d14d2 23
aie 0:8f6e8d2d14d2 24 ## Application functionality
aie 0:8f6e8d2d14d2 25
aie 0:8f6e8d2d14d2 26 The `main()` function is the single thread in the application. It toggles the state of a digital output connected to an LED on the board.
aie 0:8f6e8d2d14d2 27
aie 0:8f6e8d2d14d2 28 ## Building and running
aie 0:8f6e8d2d14d2 29
aie 0:8f6e8d2d14d2 30 1. Connect a USB cable between the USB port on the board and the host computer.
aie 0:8f6e8d2d14d2 31 2. <a name="build_cmd"></a> Run the following command to build the example project and program the microcontroller flash memory:
aie 0:8f6e8d2d14d2 32 ```bash
aie 0:8f6e8d2d14d2 33 $ mbed compile -m <TARGET> -t <TOOLCHAIN> --flash
aie 0:8f6e8d2d14d2 34 ```
aie 0:8f6e8d2d14d2 35 The binary is located at `./BUILD/<TARGET>/<TOOLCHAIN>/mbed-os-example-blinky.bin`.
aie 0:8f6e8d2d14d2 36
aie 0:8f6e8d2d14d2 37 Alternatively, you can manually copy the binary to the board, which you mount on the host computer over USB.
aie 0:8f6e8d2d14d2 38
aie 0:8f6e8d2d14d2 39 Depending on the target, you can build the example project with the `GCC_ARM`, `ARM` or `IAR` toolchain. After installing Arm Mbed CLI, run the command below to determine which toolchain supports your target:
aie 0:8f6e8d2d14d2 40
aie 0:8f6e8d2d14d2 41 ```bash
aie 0:8f6e8d2d14d2 42 $ mbed compile -S
aie 0:8f6e8d2d14d2 43 ```
aie 0:8f6e8d2d14d2 44
aie 0:8f6e8d2d14d2 45 ## Expected output
aie 0:8f6e8d2d14d2 46 The LED on your target turns on and off every 500 milliseconds.
aie 0:8f6e8d2d14d2 47
aie 0:8f6e8d2d14d2 48
aie 0:8f6e8d2d14d2 49 ## Troubleshooting
aie 0:8f6e8d2d14d2 50 If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html) for suggestions on what could be wrong and how to fix it.
aie 0:8f6e8d2d14d2 51
aie 0:8f6e8d2d14d2 52 ## Related Links
aie 0:8f6e8d2d14d2 53
aie 0:8f6e8d2d14d2 54 * [Mbed OS Stats API](https://os.mbed.com/docs/latest/apis/mbed-statistics.html).
aie 0:8f6e8d2d14d2 55 * [Mbed OS Configuration](https://os.mbed.com/docs/latest/reference/configuration.html).
aie 0:8f6e8d2d14d2 56 * [Mbed OS Serial Communication](https://os.mbed.com/docs/latest/tutorials/serial-communication.html).
aie 0:8f6e8d2d14d2 57 * [Mbed OS bare metal](https://os.mbed.com/docs/mbed-os/latest/reference/mbed-os-bare-metal.html).
aie 0:8f6e8d2d14d2 58 * [Mbed boards](https://os.mbed.com/platforms/).
aie 0:8f6e8d2d14d2 59
aie 0:8f6e8d2d14d2 60 ### License and contributions
aie 0:8f6e8d2d14d2 61
aie 0:8f6e8d2d14d2 62 The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see contributing.md for more info.
aie 0:8f6e8d2d14d2 63
aie 0:8f6e8d2d14d2 64 This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.